Names printed on tickets, with ID required at the door A maximum of four tickets per customer Tickets listed for resale to be cancelled Any tickets bought by a "business or trader" to be cancelled

Stuart Galbraith, chief executive of Kilimanjaro Live, one of the promoters of Sheeran's tour, said up to 10,000 tickets had so far been cancelled across the 18 dates.

He negotiated with ticket resellers Get Me In, Seatwave and StubHub to make sure they would not list tickets for the tour but Viagogo did not follow suit.

"Customers who have bought from Viagogo can come to our box office [outside the stadium], we invalidate the ticket, give them advice on how to claim a refund and then sell them a ticket at face value, thus saving them huge amounts of money," Mr Galbraith said.

Sheeran has partnered with Twickets - a site which allows fans to swap tickets at face value or less, in order to protect fans from the "unethical practices" of touts.Plan ahead

Up to 60,000 fans are expected each night and they have been advised to plan ahead for their journey to Cardiff as last trains to destinations such as London, Birmingham, Portsmouth and Aberdare could leave before the concert is due to finish at 22:30 BST.